Mini Bike Alarm System: 46mm x 46mm mini anti-theft device that does not take up space. PC + anti-UV material, IP54 waterproof and dustproof, high and low temperature resistance, can be used outdoors without fear of wind and rain. Easy-to-install wireless alarm system: brackets, cable ties, and double-sided tape are three wiring-free installation methods for bicycles, motorcycles, scooters, tricycles, cars, and more. Ultra-durable remote control bicycle alarm system: the host has a built-in lithium battery, USB-C charging + low battery reminder, eliminating the trouble of battery replacement. The fourth edition of energy-saving technology, the remote control battery is more durable. Super loud multi-function anti-theft bicycle: car-grade 6-segment alarm sound, 110 decibels loud volume, effectively deter thieves, and efficient anti-theft. Three kinds of bells are adjustable, remote control, one-button arming, easy to find a car! Ultra-sensitive bike tracker anti-theft: 3D displacement sensors and special algorithms can accurately identify theft and reduce false alarms. With 7-level sensitivity settings, the alarm goes off immediately when someone touches the body, moves, presses or taps. Anti-theft bicycles are also suitable for various occasions such as doors and windows. Colour:black Material:plastic Package Contents: 1 x Bicycle Alarm 1 x Remote Control Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.